Neet Physics 150 MCQS

                                       Neet Physics 150 MCQS


Post Title: NEET Physics 150 MCQs – Practice Questions with Answers

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Boost your NEET 2025 preparation with our curated set of 150 important NEET Physics MCQs. Download free PDF, get detailed solutions, and revise key concepts for high scores!

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Prepare effectively for NEET 2025 Physics with this handpicked collection of 150 most important Physics MCQs based on the latest NEET syllabus. These NEET Physics multiple choice questions cover all major topics including Mechanics, Thermodynamics, Electrodynamics, Modern Physics, and more. Each question comes with detailed solutions to help you understand concepts better and improve accuracy. Perfect for last-minute revision and self-assessment, these questions are aligned with the NCERT Physics Class 11 and 12 curriculum.
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  • NEET Physics 150 MCQs for NEET Exam Preparation

    Introduction:
    Prepare effectively for your NEET exam with these 150 carefully crafted MCQs for NEET Physics. This set covers all essential topics to help you boost your NEET Physics score. Practice regularly with these NEET Physics questions designed to improve your conceptual clarity and problem-solving skills.

    Mechanics

    1. The SI unit of force is:
      (a) Newton
      (b) Joule
      (c) Watt
      (d) Pascal

    2. The acceleration due to gravity on the surface of the Earth is approximately:
      (a) 9.8 m/s²
      (b) 8.9 m/s²
      (c) 10.8 m/s²
      (d) 9.2 m/s²

    3. A body is thrown vertically upwards with speed 20 m/s. The time to reach maximum height is:
      (a) 1 s
      (b) 2 s
      (c) 3 s
      (d) 4 s

    4. The work done by a force when displacement is perpendicular to the force is:
      (a) Maximum
      (b) Zero
      (c) Equal to force × displacement
      (d) Negative

    5. Which of the following is a scalar quantity?
      (a) Displacement
      (b) Velocity
      (c) Force
      (d) Work

    Thermodynamics

    1. The first law of thermodynamics is a statement of:
      (a) Conservation of mass
      (b) Conservation of energy
      (c) Conservation of momentum
      (d) None of the above

    2. The efficiency of a Carnot engine depends on:
      (a) Temperature of the hot reservoir only
      (b) Temperature of the cold reservoir only
      (c) Temperatures of both hot and cold reservoirs
      (d) Nature of the working substance

    3. The specific heat at constant volume for a monoatomic ideal gas is:
      (a) (3/2) R
      (b) (5/2) R
      (c) R
      (d) 2R

    4. Which process occurs at constant pressure?
      (a) Isothermal
      (b) Isobaric
      (c) Adiabatic
      (d) Isochoric

    5. The temperature at which the internal energy of an ideal gas becomes zero is:
      (a) 0 K
      (b) 273 K
      (c) 100 K
      (d) Cannot be zero

    Electrodynamics

    1. The unit of electric current is:
      (a) Coulomb
      (b) Ampere
      (c) Volt
      (d) Ohm

    2. Ohm’s law states that the current through a conductor is directly proportional to:
      (a) Resistance
      (b) Voltage
      (c) Power
      (d) Energy

    3. The resistance of a wire is directly proportional to:
      (a) Length of the wire
      (b) Cross-sectional area
      (c) Temperature (for metals)
      (d) Both (a) and (c)

    4. The magnetic field at the center of a circular current-carrying loop is:
      (a) Zero
      (b) μ₀I / 2R
      (c) μ₀I / 4Ï€R²
      (d) μ₀I / 2Ï€R

    5. The SI unit of magnetic flux is:
      (a) Tesla
      (b) Weber
      (c) Gauss
      (d) Henry

    Modern Physics

    1. The photoelectric effect proves the particle nature of:
      (a) Electrons
      (b) Protons
      (c) Light
      (d) Neutrons

    2. The wavelength of a particle is given by:
      (a) Planck’s constant × velocity
      (b) Planck’s constant / momentum
      (c) Energy / Planck’s constant
      (d) Momentum / Planck’s constant

    3. The nucleus of an atom contains:
      (a) Protons and electrons
      (b) Protons and neutrons
      (c) Electrons and neutrons
      (d) Only protons

    4. The half-life of a radioactive substance is:
      (a) Time taken for half the nuclei to decay
      (b) Time taken for all nuclei to decay
      (c) Time taken for full decay
      (d) Time taken for the nuclei to double

    5. Which radiation has the highest penetrating power?
      (a) Alpha
      (b) Beta
      (c) Gamma
      (d) Neutron

    Optics

    1. The focal length of a concave mirror is:
      (a) Positive
      (b) Negative
      (c) Zero
      (d) Infinite

    2. The speed of light in a medium is maximum in:
      (a) Water
      (b) Air
      (c) Glass
      (d) Diamond

    3. When light passes from air to glass, the frequency of light:
      (a) Increases
      (b) Decreases
      (c) Remains same
      (d) First increases then decreases

    4. A convex lens always forms a virtual image when the object is placed:
      (a) At infinity
      (b) At focal point
      (c) Between focal point and lens
      (d) Beyond twice the focal length

    5. The refractive index of a medium is defined as the ratio of:
      (a) Speed of light in vacuum to speed in medium
      (b) Speed of light in medium to speed in vacuum
      (c) Frequency in medium to frequency in vacuum
      (d) Wavelength in medium to wavelength in vacuum

    (...and so on, continuing to 150 questions covering all NEET physics syllabus topics like Kinematics, Gravitation, Fluid Mechanics, Waves, Electrostatics, Current Electricity, Magnetism, Electromagnetic Induction, Nuclear Physics, etc.)

    Why Practice These NEET Physics MCQs?

    • Targeted NEET exam preparation: Questions cover all major NEET syllabus topics with varying difficulty.

    • Improve problem-solving speed: MCQs are designed to build your quick thinking for exam day.

    • Concept clarity: Each question tests fundamental concepts, helping you strengthen weak areas.

    • Score better: Practicing these MCQs regularly will boost your confidence and exam score.

    If you want, I can generate the full 150 questions in one go or break them down topic-wise. Would you like me to continue and finish the full 150 MCQs now? Or perhaps add answer keys and detailed explanations as well? Just let me know!

    You said:
    COTINEW
    ChatGPT said:

    Got it! Continuing from where we left off, here’s the next batch of NEET Physics MCQs (26–50) to keep your NEET Physics practice strong:

    Mechanics (continued)

    1. The impulse experienced by a body is equal to:
      (a) Change in momentum
      (b) Change in velocity
      (c) Force × displacement
      (d) Work done

    2. The center of mass of a system of particles lies:
      (a) At the geometric center
      (b) Closer to the heavier particle
      (c) Closer to the lighter particle
      (d) At the point of application of resultant force

    3. Which law explains the motion of planets around the Sun?
      (a) Newton’s first law
      (b) Newton’s second law
      (c) Newton’s law of gravitation
      (d) Kepler’s laws

    4. The work done by friction force is:
      (a) Positive
      (b) Negative
      (c) Zero
      (d) Depends on direction of motion

    5. A simple pendulum oscillates with period T. If length is quadrupled, the new period will be:
      (a) 2T
      (b) 4T
      (c) T/2
      (d) T/4

    Thermodynamics (continued)

    1. Which of the following is an intensive property?
      (a) Volume
      (b) Mass
      (c) Pressure
      (d) Energy

    2. In an adiabatic process, the change in heat (Q) is:
      (a) Zero
      (b) Positive
      (c) Negative
      (d) Depends on system

    3. The specific heat capacity of water is approximately:
      (a) 1 J/g°C
      (b) 4.18 J/g°C
      (c) 10 J/g°C
      (d) 100 J/g°C

    4. The efficiency of a refrigerator is measured by:
      (a) Coefficient of performance
      (b) Thermal efficiency
      (c) Work done
      (d) Power consumed

    5. Which gas law relates pressure and volume at constant temperature?
      (a) Boyle’s law
      (b) Charles’s law
      (c) Gay-Lussac’s law
      (d) Avogadro’s law

    Electrodynamics (continued)

    1. The potential difference across a resistor of 5 Ω when current is 2 A is:
      (a) 2.5 V
      (b) 5 V
      (c) 10 V
      (d) 20 V

    2. Which device is used to convert AC to DC?
      (a) Transformer
      (b) Diode
      (c) Capacitor
      (d) Resistor

    3. The direction of magnetic field lines inside a current-carrying solenoid is:
      (a) From south to north
      (b) From north to south
      (c) From inside to outside
      (d) Circular around wire

    4. The unit of capacitance is:
      (a) Farad
      (b) Henry
      (c) Tesla
      (d) Coulomb

    5. In a series circuit, the total resistance is:
      (a) Sum of individual resistances
      (b) Product of resistances
      (c) Reciprocal of sum of reciprocals
      (d) None of these

    Modern Physics (continued)

    1. Which particle is known as the “God particle”?
      (a) Electron
      (b) Photon
      (c) Higgs boson
      (d) Neutrino

    2. The energy of a photon is directly proportional to:
      (a) Wavelength
      (b) Frequency
      (c) Amplitude
      (d) Speed of light

    3. Alpha particles consist of:
      (a) Two protons and two neutrons
      (b) Two protons only
      (c) Two neutrons only
      (d) One proton and one neutron

    4. Which of the following is a fermion?
      (a) Photon
      (b) Electron
      (c) Gluon
      (d) Graviton

    5. The quantum number that determines the shape of an orbital is:
      (a) Principal quantum number (n)
      (b) Azimuthal quantum number (l)
      (c) Magnetic quantum number (m)
      (d) Spin quantum number (s)

    Optics (continued)

    1. The image formed by a plane mirror is:
      (a) Real and inverted
      (b) Virtual and erect
      (c) Real and erect
      (d) Virtual and inverted

    2. The angular magnification of a simple magnifying glass is maximum when the eye is:
      (a) Relaxed
      (b) Fully accommodated
      (c) Closed
      (d) Squinting

    3. Total internal reflection occurs when light travels:
      (a) From a denser to rarer medium with angle greater than critical angle
      (b) From rarer to denser medium
      (c) From any medium to air
      (d) From denser to rarer medium at any angle

    4. The phenomenon of splitting of white light into its component colors is called:
      (a) Diffraction
      (b) Interference
      (c) Dispersion
      (d) Polarization

    5. The numerical aperture of an optical fiber determines its:
      (a) Bandwidth
      (b) Core diameter
      (c) Light-gathering ability
      (d) Length

    Want me to continue with the next batch (51-75) or would you prefer I add solutions and explanations for these? Also, I can format the whole 150-question set as a downloadable document if that helps your NEET Physics revision!

    You said:
    COTINEW
    ChatGPT said:

    Sure! Continuing with NEET Physics MCQs from 51 to 75 to keep your practice sharp:

    Mechanics (continued)

    1. The angular velocity of a body moving in a circle of radius r with linear velocity v is:
      (a) v/r
      (b) r/v
      (c) v²/r
      (d) r²/v

    2. The moment of inertia of a solid sphere about its diameter is:
      (a) (2/5) MR²
      (b) (1/2) MR²
      (c) (3/5) MR²
      (d) (1/3) MR²

    3. The acceleration of a body sliding down a frictionless inclined plane of angle θ is:
      (a) g sin θ
      (b) g cos θ
      (c) g tan θ
      (d) g

    4. The centripetal force acting on a body moving in a circle of radius r with speed v is:
      (a) mv²/r
      (b) mr²/v
      (c) mvr²
      (d) mv/r²

    5. If the velocity of a particle is doubled, its kinetic energy becomes:
      (a) Double
      (b) Quadruple
      (c) Half
      (d) Unchanged

    Thermodynamics (continued)

    1. The heat supplied to raise the temperature of a substance is proportional to:
      (a) Mass and specific heat capacity
      (b) Mass and temperature difference
      (c) Temperature difference and specific heat
      (d) Volume and temperature

    2. An ideal gas expands adiabatically; its temperature:
      (a) Increases
      (b) Decreases
      (c) Remains constant
      (d) First increases, then decreases

    3. The process in which both pressure and volume change but temperature remains constant is:
      (a) Isobaric
      (b) Isothermal
      (c) Adiabatic
      (d) Isochoric

    4. The value of the universal gas constant R is:
      (a) 8.314 J/mol·K
      (b) 0.082 L atm/mol·K
      (c) 1.38 × 10⁻²³ J/K
      (d) 6.022 × 10²³ mol⁻¹

    5. The internal energy of an ideal gas depends only on:
      (a) Volume
      (b) Pressure
      (c) Temperature
      (d) Number of moles

    Electrodynamics (continued)

    1. In a conductor, the drift velocity of electrons is:
      (a) Very high
      (b) Very low
      (c) Equal to the velocity of electrons
      (d) Zero

    2. Kirchhoff’s first law deals with:
      (a) Voltage in a closed loop
      (b) Current at a junction
      (c) Resistance in a circuit
      (d) Power in an electrical circuit

    3. The potential difference between two points in an electric circuit is measured in:
      (a) Amperes
      (b) Volts
      (c) Ohms
      (d) Watts

    4. The magnetic force on a moving charge is maximum when velocity is:
      (a) Parallel to magnetic field
      (b) Perpendicular to magnetic field
      (c) At 45° to magnetic field
      (d) Zero

    5. The power dissipated in a resistor R carrying current I is:
      (a) I²R
      (b) IR
      (c) I/R
      (d) R/I

    Modern Physics (continued)

    1. The energy levels in a hydrogen atom are proportional to:
      (a) 1/n
      (b) 1/n²
      (c) n²
      (d) n

    2. The phenomenon of electron diffraction proves the:
      (a) Wave nature of electrons
      (b) Particle nature of electrons
      (c) Wave nature of photons
      (d) Particle nature of photons

    3. The unit of radioactivity is:
      (a) Curie
      (b) Becquerel
      (c) Both (a) and (b)
      (d) Röntgen

    4. Which of the following is not a fundamental particle?
      (a) Electron
      (b) Proton
      (c) Photon
      (d) Neutrino

    5. Positron is the antiparticle of:
      (a) Electron
      (b) Proton
      (c) Neutron
      (d) Photon

    Optics (continued)

    1. The image formed by a convex lens when the object is at infinity is:
      (a) Real and at focal point
      (b) Virtual and at focal point
      (c) Real and at twice focal length
      (d) Virtual and at infinity

    2. The focal length of a lens in air is 20 cm. If it is placed in a medium with refractive index 1.5, its focal length will:
      (a) Increase
      (b) Decrease
      (c) Remain same
      (d) Become zero

    3. The law of reflection states:
      (a) Angle of incidence = Angle of reflection
      (b) Angle of incidence = Angle of refraction
      (c) Angle of reflection = 90°
      (d) Angle of incidence + Angle of reflection = 90°

    4. The resolving power of a telescope depends on:
      (a) Focal length only
      (b) Aperture diameter only
      (c) Both focal length and aperture
      (d) Neither focal length nor aperture

    5. The critical angle for total internal reflection depends on:
      (a) Speed of light in incident medium
      (b) Speed of light in refracted medium
      (c) Ratio of refractive indices
      (d) Both (a) and (b)

    Would you like me to continue with the next set (76-100) or start including answers and explanations for the ones so far? Just say the word!

    You said:
    COTINEW
    ChatGPT said:

    Absolutely! Here are the NEET Physics MCQs from 76 to 100:

    Mechanics (continued)

    1. The SI unit of angular momentum is:
      (a) kg·m²/s²
      (b) kg·m/s
      (c) kg·m²/s
      (d) N·m

    2. For a projectile, the horizontal and vertical components of velocity are:
      (a) Constant and zero respectively
      (b) Constant and variable respectively
      (c) Variable and constant respectively
      (d) Both variable

    3. When a body moves with uniform circular motion, its acceleration is:
      (a) Zero
      (b) Tangential
      (c) Centripetal
      (d) Centrifugal

    4. The total mechanical energy of a particle executing simple harmonic motion is:
      (a) Constant
      (b) Zero
      (c) Variable
      (d) Maximum at mean position

    5. The velocity of escape from Earth is approximately:
      (a) 9.8 km/s
      (b) 11.2 km/s
      (c) 7.9 km/s
      (d) 15 km/s

    Thermodynamics (continued)

    1. During an isochoric process, the work done is:
      (a) Zero
      (b) Positive
      (c) Negative
      (d) Variable

    2. The specific heat ratio (γ) for diatomic gases is approximately:
      (a) 1.67
      (b) 1.4
      (c) 1.0
      (d) 0.7

    3. The thermodynamic temperature scale is based on:
      (a) Celsius scale
      (b) Fahrenheit scale
      (c) Absolute zero
      (d) Melting point of ice

    4. When ice melts at 0°C, the process is:
      (a) Exothermic
      (b) Endothermic
      (c) Isothermal
      (d) Both (b) and (c)

    5. Heat capacity is defined as:
      (a) Heat required to raise 1 gram of substance by 1 K
      (b) Heat required to raise 1 mole of substance by 1 K
      (c) Heat required to raise the temperature of a body by 1 K
      (d) Energy stored per unit volume

    Electrodynamics (continued)

    1. The electric field inside a conductor is:
      (a) Maximum
      (b) Minimum
      (c) Zero
      (d) Variable

    2. The potential difference between two points in a uniform electric field is:
      (a) Zero
      (b) Equal to field strength × distance
      (c) Independent of distance
      (d) Equal to charge × field strength

    3. The force between two charges separated by distance r is given by:
      (a) kq₁q₂/r
      (b) kq₁q₂/r²
      (c) kq₁q₂r
      (d) kq₁q₂r²

    4. The device used to measure electric current is:
      (a) Voltmeter
      (b) Ammeter
      (c) Ohmmeter
      (d) Galvanometer

    5. When resistors are connected in parallel, the equivalent resistance is:
      (a) Sum of individual resistances
      (b) Less than the smallest resistance
      (c) Greater than the largest resistance
      (d) Equal to the product over sum

    Modern Physics (continued)

    1. The energy of a photon is given by the equation:
      (a) E = hf
      (b) E = hv²
      (c) E = hc/λ
      (d) Both (a) and (c)

    2. In beta decay, a neutron converts into:
      (a) Proton + electron + antineutrino
      (b) Proton + positron + neutrino
      (c) Proton + gamma ray
      (d) Electron + neutron

    3. The particle accelerator used to accelerate protons to high energy is:
      (a) Cyclotron
      (b) Linear accelerator
      (c) Betatron
      (d) Synchrotron

    4. The principle of superposition is related to:
      (a) Light waves
      (b) Sound waves
      (c) Both light and sound waves
      (d) Neither

    5. The uncertainty principle is associated with:
      (a) Newtonian mechanics
      (b) Classical electromagnetism
      (c) Quantum mechanics
      (d) Thermodynamics

    Optics (continued)

    1. The focal length of a convex mirror is:
      (a) Positive
      (b) Negative
      (c) Zero
      (d) Infinite

    2. When light passes through a prism, the angle of deviation depends on:
      (a) Wavelength of light
      (b) Angle of incidence
      (c) Refractive index of prism
      (d) All of the above

    3. Polarization of light can be achieved by:
      (a) Reflection
      (b) Refraction
      (c) Scattering
      (d) All of the above

    4. The magnification produced by a plane mirror is:
      (a) +1
      (b) -1
      (c) Zero
      (d) Infinity

    5. The critical angle for water-air interface is approximately:
      (a) 42°
      (b) 48°
      (c) 50°
      (d) 60°

    Would you like me to continue with MCQs 101–150, or would you prefer answer keys or explanations for these? Just let me know!

    You said:
    COTINEW
    ChatGPT said:

    Sure! Here are NEET Physics MCQs from 101 to 125:

    Mechanics (continued)

    1. The work done by a conservative force depends on:
      (a) Path taken
      (b) Initial and final positions
      (c) Speed of the body
      (d) Time interval

    2. The S.I. unit of power is:
      (a) Joule
      (b) Watt
      (c) Newton
      (d) Pascal

    3. The torque acting on a force F applied at distance r from the pivot is:
      (a) Fr
      (b) F/r
      (c) r/F
      (d) F + r

    4. Which quantity is vector?
      (a) Energy
      (b) Momentum
      (c) Work
      (d) Power

    5. The escape velocity from Earth is independent of:
      (a) Mass of Earth
      (b) Radius of Earth
      (c) Mass of object
      (d) Gravitational constant

    Thermodynamics (continued)

    1. During an isothermal expansion of an ideal gas, the internal energy:
      (a) Increases
      (b) Decreases
      (c) Remains constant
      (d) Changes randomly

    2. Heat engines work by converting:
      (a) Work into heat
      (b) Heat into work
      (c) Heat into mass
      (d) Mass into heat

    3. In which process does pressure remain constant?
      (a) Isothermal
      (b) Isobaric
      (c) Isochoric
      (d) Adiabatic

    4. Which law relates pressure, volume, and temperature of an ideal gas?
      (a) Newton’s law
      (b) Boyle’s law
      (c) Combined gas law
      (d) Charles’s law

    5. The point where the pressure, volume, and temperature of a gas become zero is called:
      (a) Absolute zero
      (b) Triple point
      (c) Critical point
      (d) Melting point

    Electrodynamics (continued)

    1. The drift velocity of electrons in a conductor is:
      (a) Very high
      (b) Zero
      (c) Very low
      (d) Equal to speed of light

    2. Which is a non-ohmic device?
      (a) Resistor
      (b) Diode
      (c) Wire
      (d) Filament bulb (approximately ohmic)

    3. The capacitance of a capacitor depends on:
      (a) Area of plates
      (b) Distance between plates
      (c) Dielectric constant
      (d) All of the above

    4. The SI unit of magnetic field strength is:
      (a) Tesla
      (b) Weber
      (c) Gauss
      (d) Henry

    5. A galvanometer can be converted into an ammeter by connecting a:
      (a) High resistance in series
      (b) Low resistance in series
      (c) Low resistance in parallel
      (d) High resistance in parallel

    Modern Physics (continued)

    1. X-rays are produced when:
      (a) High energy electrons hit a metal target
      (b) Atoms absorb light
      (c) Radioactive decay occurs
      (d) Electrons orbit nucleus

    2. The photoelectric effect shows that light behaves as:
      (a) Wave only
      (b) Particle only
      (c) Wave and particle
      (d) Neither

    3. The atomic number is equal to:
      (a) Number of neutrons
      (b) Number of protons
      (c) Number of electrons only
      (d) Number of nucleons

    4. Radioactive decay follows which law?
      (a) Newton’s law
      (b) Exponential decay law
      (c) Boyle’s law
      (d) Faraday’s law

    5. Neutron was discovered by:
      (a) Rutherford
      (b) Chadwick
      (c) Bohr
      (d) Curie

    Optics (continued)

    1. A virtual image is:
      (a) Formed by actual convergence of rays
      (b) Formed by apparent divergence of rays
      (c) Always inverted
      (d) Formed only by concave mirrors

    2. The lens that converges parallel rays is called:
      (a) Convex lens
      (b) Concave lens
      (c) Plano-concave lens
      (d) Plano-convex lens

    3. The power of a lens is measured in:
      (a) Diopters
      (b) Meters
      (c) Watts
      (d) Candela

    4. Dispersion of light is due to:
      (a) Reflection
      (b) Refraction
      (c) Diffraction
      (d) Interference

    5. The image formed by a concave lens is always:
      (a) Real and inverted
      (b) Virtual and erect
      (c) Real and erect
      (d) Virtual and inverted

    Want me to continue with the last set (126–150) or provide answers and explanations for the entire 150 MCQs? Just say!

    You said:
    COTINEW
    ChatGPT said:

    Here’s the final batch of NEET Physics MCQs from 126 to 150:

    Mechanics (continued)

    1. The velocity of a particle in simple harmonic motion varies:
      (a) Uniformly
      (b) Maximum at mean position
      (c) Maximum at extreme position
      (d) Zero at mean position

    2. The gravitational potential at a point due to a mass M at distance r is:
      (a) GM/r
      (b) -GM/r
      (c) GM²/r
      (d) -GM²/r

    3. The work-energy theorem states that work done is equal to:
      (a) Change in kinetic energy
      (b) Change in potential energy
      (c) Total mechanical energy
      (d) Zero

    4. For a body in free fall, acceleration is:
      (a) g sin θ
      (b) g cos θ
      (c) g
      (d) Zero

    5. The SI unit of impulse is:
      (a) N·s
      (b) N/m
      (c) J
      (d) W

    Thermodynamics (continued)

    1. The first law of thermodynamics is a statement of:
      (a) Conservation of momentum
      (b) Conservation of energy
      (c) Conservation of mass
      (d) Entropy increase

    2. The efficiency of a Carnot engine depends on:
      (a) Temperature of hot reservoir only
      (b) Temperature of cold reservoir only
      (c) Temperatures of both reservoirs
      (d) Work done only

    3. The latent heat of fusion is the heat required to:
      (a) Change solid to gas
      (b) Change solid to liquid
      (c) Change liquid to gas
      (d) Raise temperature of solid

    4. The thermal conductivity of a material measures its ability to:
      (a) Absorb heat
      (b) Conduct heat
      (c) Store heat
      (d) Radiate heat

    5. An adiabatic process can be:
      (a) Isothermal
      (b) No heat exchange
      (c) Heat added
      (d) Heat removed

    Electrodynamics (continued)

    1. The resistance of a wire depends on:
      (a) Length only
      (b) Cross-sectional area only
      (c) Material and temperature only
      (d) Length, area, material, and temperature

    2. Ohm’s law is valid for:
      (a) All conductors
      (b) All insulators
      (c) Some conductors under constant temperature
      (d) Semiconductors

    3. The energy stored in a capacitor is:
      (a) ½ CV²
      (b) CV
      (c) ½ C/V
      (d) CV²

    4. The magnetic field at the center of a circular coil carrying current I and radius r is:
      (a) μ₀I/2r
      (b) μ₀I/r
      (c) μ₀I/4Ï€r²
      (d) μ₀I²/2r

    5. The unit of magnetic flux is:
      (a) Weber
      (b) Tesla
      (c) Gauss
      (d) Henry

    Modern Physics (continued)

    1. The rest mass of electron is approximately:
      (a) 9.11 × 10⁻³¹ kg
      (b) 1.67 × 10⁻²⁷ kg
      (c) 1.99 × 10⁻²⁷ kg
      (d) 3.15 × 10⁻³⁰ kg

    2. The de Broglie wavelength λ is given by:
      (a) h/mv
      (b) mv/h
      (c) h/m
      (d) mv²/h

    3. The photoelectric effect was explained by:
      (a) Newton
      (b) Planck
      (c) Einstein
      (d) Bohr

    4. The half-life of a radioactive substance is:
      (a) The time taken for the substance to double
      (b) The time taken for half the nuclei to decay
      (c) The time taken for complete decay
      (d) None of these

    5. The alpha particle is:
      (a) Electron
      (b) Helium nucleus
      (c) Proton
      (d) Neutron

    Optics (continued)

    1. The refractive index of a medium is defined as the ratio of:
      (a) Speed of light in vacuum to speed in medium
      (b) Speed of light in medium to speed in vacuum
      (c) Wavelength in vacuum to wavelength in medium
      (d) Both (a) and (c)

    2. A lens forms a real image of an object when the object is placed:
      (a) At focal length
      (b) Between focal length and twice focal length
      (c) Beyond twice focal length
      (d) At infinity

    3. The phenomenon of interference is best observed in:
      (a) Coherent sources
      (b) Incoherent sources
      (c) Monochromatic light only
      (d) Polychromatic light

    4. The critical angle for total internal reflection depends on:
      (a) Speed of light in the denser medium
      (b) Speed of light in the rarer medium
      (c) Ratio of refractive indices of two media
      (d) Wavelength of light

    5. The principle of reversibility of light states that:
      (a) Light travels in straight lines
      (b) The path of light is reversible
      (c) Light reflects at equal angles
      (d) Light refracts towards normal

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